2.A single-phase semiconu small separately excited d. is connected to à single - p = 0.50 ohm and the armatr constant is Ke 0 = 0.1 V/ motor runs at 1200 rpm an %3D motor current is continuou. determine: (a) The firing angle a. (b) The power delivered to (c) The supply power facte

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The fig2 is half controlled
CASIO
- Iq= 30A
balß
Controlled
2.A single-phase semiconverter , shown in Fig.2 , is used to control the speed of
small separately excited d.c. motor rated at 4.5 kW, 220V, 1500 rpm. The converter
is connected to a single – phase 230 V, 50 Hz supply. The armature resistance is Ra
0.50 ohm and the armature circuit inductance is La = 10 mH. The motor voltage
constant is Ke ð = 0.1 V/rpm. With the converter operates as a rectifier , the d.c.
motor runs at 1200 rpm and carries an armature current of 16 A . Assume that the
motor current is continuous and ripple-free,
moto
determine:
(a) The firing angle a.
(b) The power delivered to the motor.
(c) The supply power factor.
= 230X2
Transcribed Image Text:CASIO - Iq= 30A balß Controlled 2.A single-phase semiconverter , shown in Fig.2 , is used to control the speed of small separately excited d.c. motor rated at 4.5 kW, 220V, 1500 rpm. The converter is connected to a single – phase 230 V, 50 Hz supply. The armature resistance is Ra 0.50 ohm and the armature circuit inductance is La = 10 mH. The motor voltage constant is Ke ð = 0.1 V/rpm. With the converter operates as a rectifier , the d.c. motor runs at 1200 rpm and carries an armature current of 16 A . Assume that the motor current is continuous and ripple-free, moto determine: (a) The firing angle a. (b) The power delivered to the motor. (c) The supply power factor. = 230X2
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